Kent · England
Sand mastic for sash & case windows in Badgers Mount, Kent
Problem with your window and door surrounds in Badgers Mount? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Open joints round the window box
- Draughts and rain around sash boxes
- A silicone bead on a sash window that spoils the look
What the job involves on each surface
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
Sand mastic for homes and businesses in Badgers Mount
We renew sand mastic around sash windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you have patchy fillers round a sash window and old sand mastic that has cracked, crumbled or fallen out, we can put it right, on brick reveals, timber door frames and period & listed homes alike.
Around Badgers Mount, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Our work is backed for twelve months.
- Place
- Badgers Mount (TN14)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Badgers Mount: local notes
Historic houses like Lullingstone Castle (about 2.5 miles north-east) are a reminder that the area around Badgers Mount has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as Halstead Community Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. If you live in an older home near St Margaret's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Badgers Mount is about 4 miles south-east of Orpington, in Kent. Whether you are in the middle of Badgers Mount or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent. London is on our list too, around 15 miles away.
Work in TN14 works the same way as everywhere else we cover. Local streets include Old London Road, Woodlands View and Orpington Bypass. You will find Badgers Mount on the A224, so it’s easy for us to get to. Other places close to Badgers Mount include Halstead (1 mile south-west), Bopeep (1 mile north), Maypole (1 mile north), Well Hill (1 mile north) and Sepham Heath (1 mile south). Within a short drive, we also cover Dartford (8 miles north-east), Sevenoaks (4 miles south-east), Royal Tunbridge Wells (15 miles south), Gravesend (12 miles north-east), Tonbridge (11 miles south-east) and Northfleet (11 miles north-east).
Around Badgers Mount
In Badgers Mount, that means homes and buildings near Green Street Green Primary School, Hewitt's Chalk Bank and The Cock Inn, among other places. The closest station to Badgers Mount is Knockholt station, about 0.8 miles north-west of the centre. Nearby you’ll also find Otford Heritage Centre (3 miles south-east) and Lullingstone Castle (2.5 miles north-east). Green spaces nearby include Downe Bank Nature Reserve.
Your questions about sand mastic in Badgers Mount
Do you work for landlords with property near Knockholt station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Will you come out to Badgers Mount?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. Timing depends on the weather and the joint.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
How much does sand mastic cost in Badgers Mount?
Size, access and the old material all affect the cost. Ask us for a quote.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Badgers Mount.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish but the decision is theirs.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and shaped to suit the surround.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we can’t put right
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Sashes that need overhauling
- Rotten sashes, sills or window boxes (a joiner’s job)
- Broken panes
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Tenement windows
- Sash and case windows
- Brick reveals
- Stone surrounds
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before we start. Most jobs take anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Badgers Mount, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
Get a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
Related advice
Places near Badgers Mount
What else we do in Badgers Mount
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Do not paint over the new mastic
- Look over the window mastic once a year
- Plan mastic work ahead of painting
- Make sure water runs off the sill
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
Common problems we fix in Badgers Mount
Most of it is simply age. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
The problems people usually mention when they call include:
- Mastic worn away on windows facing the weather
- Patchy fillers round a sash window
- Wind and rain getting in round a sash window
- Gaps where the frame meets the masonry
Letting a property close to Knockholt station? Then any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- Are they insured?
- What the cure time is
- What happens if the job turns out different
- What the quote includes, VAT included or not
What affects the cost of sand mastic
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- How easy the joints are to reach
- Any mould that needs treating
- The type of sealant required
- How much old sealant there is and how hard it is to remove
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Asking for a quote
To help us quote quickly, let us know:
- Where the job is, and your postcode
- A few photos by email, if you can
- Any access issues, like height or stairs
- Whether it’s a home or a business
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work.